📄 12.2 servlet事件监听器.mht
字号:
<P=20
class=3Da2> &n=
bsp; =20
//TODO =
=B5=B1=B0=D1ServletContext=D6=D0=B5=C4=C4=B3=B8=F6=CA=F4=D0=D4=C9=BE=B3=FD=
=CA=B1=A3=AC=B5=F7=D3=C3=B8=C3=B7=BD=B7=A8</P>
<P=20
class=3Da2> &n=
bsp; =20
print("=C9=BE=B3=FDServletContext=B6=D4=CF=F3=B5=C4=C4=B3=D2=BB=B8=F6=CA=F4=
=D0=D4=A3=BAattributeRemoved('</P>
<P=20
class=3Da2> &n=
bsp; &nb=
sp; =20
"+sa.getName()+"','")");</P>
<P class=3Da2> }</P>
<P class=3Da2> public =
void=20
attributeReplaced(ServletContextAttributeEvent sa) {</P>
<P=20
class=3Da2> &n=
bsp; =20
//TODO =
=B5=B1=C9=CF=CF=C2=CE=C4=BD=F8=D0=D0=CA=F4=D0=D4=D6=B5=B8=FC=D0=C2=CA=B1=A3=
=AC=BD=AB=B5=F7=D3=C3=B8=C3=B7=BD=B7=A8</P>
<P=20
class=3Da2> &n=
bsp; =20
print("=B8=FC=B8=C4ServletContext=B6=D4=CF=F3=B5=C4=C4=B3=D2=BB=B8=F6=CA=F4=
=D0=D4=A3=BAattributeReplaced('</P>
<P=20
class=3Da2> &n=
bsp; &nb=
sp; =20
"+sa.getName()+"','"+sa.getValue()+"')"); </P>
<P class=3Da2> =20
} </P>
<P class=3Da2> private =
void=20
print(String message){</P>
<P=20
class=3Da2> &n=
bsp; =20
//=B5=F7=D3=C3=B8=C3=B7=BD=B7=A8=D4=DAtxt=CE=C4=BC=FE=D6=D0=B4=F2=D3=A1=B3=
=F6message=D7=D6=B7=FB=B4=AE=D0=C5=CF=A2</P>
<P=20
class=3Da2> &n=
bsp; =20
PrintWriter out =3D null;</P>
<P=20
class=3Da2> &n=
bsp; =20
try{</P>
<P=20
class=3Da2> &n=
bsp; &nb=
sp; =20
out =3D new PrintWriter(new =
FileOutputStream("D:\\output.txt",true));</P>
<P=20
class=3Da2> &n=
bsp; &nb=
sp; =20
out.println(new java.util.Date().toLocaleString()+" ContextListener:=20
"+message);</P>
<P=20
class=3Da2> &n=
bsp; &nb=
sp; =20
out.close();</P>
<P=20
class=3Da2> &n=
bsp; =20
}</P>
<P=20
class=3Da2> &n=
bsp; =20
catch(Exception e)</P>
<P=20
class=3Da2> &n=
bsp; =20
{</P>
<P=20
class=3Da2> &n=
bsp; &nb=
sp; =20
e.printStackTrace();</P>
<P=20
class=3Da2> &n=
bsp; =20
}</P>
<P class=3Da2> }</P>
<P class=3Da2>}</P>
<P=20
class=3DMsoNormal>=B3=CC=D0=F2=CB=B5=C3=F7=A3=BA=B8=C3=BC=E0=CC=FD=C6=F7=C0=
=E0=CA=B5=CF=D6=C1=CBServletContextAttributeListener=BA=CDServletContextL=
istener=C1=BD=B8=F6=BD=D3=BF=DA=C0=E0=D6=D0=B5=C45=B8=F6=B7=BD=B7=A8=A3=BA=
</P>
<P class=3Da1 style=3D"MARGIN-LEFT: 39pt; TEXT-INDENT: =
-21pt"> =A1=F1=20
contextInitialized(ServletContextEvent =
s)=B7=BD=B7=A8=D3=C3=C0=B4=B3=F5=CA=BC=BB=AFServletContext=B6=D4=CF=F3=A1=
=A3</P>
<P class=3Da1 style=3D"MARGIN-LEFT: 39pt; TEXT-INDENT: =
-21pt"> =A1=F1=20
contextDestroyed(ServletContextEvent =
s)=B7=BD=B7=A8=D4=DA=C9=CF=CF=C2=CE=C4=D6=D0=C9=BE=B3=FD=C4=B3=B8=F6=CA=F4=
=D0=D4=CA=B1=B5=F7=D3=C3=A1=A3</P>
<P class=3Da1 style=3D"MARGIN-LEFT: 39pt; TEXT-INDENT: =
-21pt"> =A1=F1=20
attributeAdded(ServletContextAttributeEvent =
sa)=B7=BD=B7=A8=D4=DA=C9=CF=CF=C2=CE=C4=D6=D0=CC=ED=BC=D3=D2=BB=B8=F6=D0=C2=
=B5=C4=CA=F4=D0=D4=CA=B1=B5=F7=D3=C3=A1=A3</P>
<P class=3Da1 style=3D"MARGIN-LEFT: 39pt; TEXT-INDENT: =
-21pt"> =A1=F1=20
attributeReplaced(ServletContextAttributeEvent =
sa)=B7=BD=B7=A8=D4=DA=B8=FC=D0=C2=CA=F4=D0=D4=CA=B1=B5=F7=D3=C3=A1=A3</P>=
<P class=3Da1 style=3D"MARGIN-LEFT: 39pt; TEXT-INDENT: =
-21pt"> =A1=F1=20
attributeRemoved(ServletContextAttributeEvent =
sa)=B7=BD=B7=A8=D4=DA=C9=CF=CF=C2=CE=C4=D6=D0=C9=BE=B3=FD=C4=B3=B8=F6=CA=F4=
=D0=D4=CA=B1=BB=E1=B1=BB=B5=F7=D3=C3=A1=A3</P>
<P =
class=3DMsoNormal>=D4=DA=CA=B9=D3=C3=D5=E2=B8=F6=BC=E0=CC=FD=C6=F7=D6=AE=C7=
=B0=BB=B9=D0=E8=D2=AA=D4=DAWeb=C4=A3=BF=E9=D6=D0=B5=C4web.xml=C5=E4=D6=C3=
=CE=C4=BC=FE=D6=D0=BD=F8=D0=D0=C9=F9=C3=F7=A3=AC=B4=FA=C2=EB=C8=E7=CF=C2=A3=
=BA</P>
<P class=3Da2><listener></P>
<P class=3Da2> =20
<listener-class>servlet.MyServletContextListener</listener-class=
></P>
<P class=3Da2></listener></P>
<P=20
class=3DMsoNormal>=BD=D3=CF=C2=C0=B4=BE=CD=B1=E0=D0=B4JSP=B3=CC=D0=F2=C0=B4=
=B2=D9=D7=F7ServletContext=B5=C4=CA=F4=D0=D4=A3=AC=BF=B4=BF=B4=BC=E0=CC=FD=
=C6=F7=B3=CC=D0=F2=D7=F7=B3=F6=CA=B2=C3=B4=B7=B4=D3=A6=A3=AC=B8=C3JSP=B5=C4=
=D2=BB=B6=CE=B4=FA=C2=EB=C8=E7=CF=C2=A3=BA</P>
<P class=3Da2><%</P>
<P class=3Da2> out.println(=A1=B0Test =
ServletContextListener=A1=B1);</P>
<P class=3Da2> =20
application.setAttribute(=A1=B0userid=A1=B1,=A1=B1zzb=A1=B1); =
&=
nbsp; =20
//=CC=ED=BC=D3=D2=BB=B8=F6=CA=F4=D0=D4</P>
<P class=3Da2> =20
application.setAttribute(=A1=B0userid=A1=B1,=A1=B1zzb2=A1=B1);  =
; =
=
//=CC=E6=BB=BB=B5=F4=D2=D1=BE=AD=CC=ED=BC=D3=B5=C4=CA=F4=D0=D4</P>
<P class=3Da2> =20
application.removeAttribute(=A1=B0userid=A1=B1); &=
nbsp; &n=
bsp; =20
//=C9=BE=B3=FD=B8=C3=CA=F4=D0=D4</P>
<P class=3Da2>%></P>
<P=20
class=3DMsoNormal>=B4=FA=C2=EB=CB=B5=C3=F7=A3=BA=B5=B1=B5=DA=D2=BB=B4=CE=CC=
=ED=BC=D3=CA=F4=D0=D4userid=CA=B1=A3=AC=BC=E0=CC=FD=C6=F7=B5=F7=D3=C3cont=
extInitialized(ServletContextEvent=20
s)=B3=F5=CA=BC=BB=AF=BC=E0=CC=FD=B7=BD=B7=A8=BA=CDattributeAdded(ServletC=
ontextAttributeEvent =
sa)=CC=ED=BC=D3=CA=F4=D0=D4=BC=E0=CC=FD=B7=BD=B7=A8=A1=A3</P>
<P =
class=3DMsoNormal>=BF=C9=D2=D4=B2=E9=BF=B4D=B8=F9=C4=BF=C2=BC=CF=C2=B5=C4=
output.txt=CE=C4=BC=FE=C4=DA=C8=DD=A3=AC=C8=E7=CF=C2=A3=BA</P>
<P class=3Da2>2006-7-12 14:07:50 ContextListener: =
ServletContext=B3=F5=CA=BC=BB=AF......</P>
<P class=3Da2>2006-7-12 14:13:55 ContextListener:=20
=D4=F6=BC=D3ServletContext=B6=D4=CF=F3=B5=C4=D2=BB=B8=F6=CA=F4=D0=D4=A3=BA=
attributeAdded('userid','zzb')</P>
<P class=3Da2>2006-7-12 14:13:55 ContextListener:=20
=B8=FC=B8=C4ServletContext=B6=D4=CF=F3=B5=C4=C4=B3=D2=BB=B8=F6=CA=F4=D0=D4=
=A3=BAattributeReplaced ('userid','zzb2')</P>
<P class=3Da2>2006-7-12 14:13:55 ContextListener:=20
=C9=BE=B3=FDServletContext=B6=D4=CF=F3=B5=C4=C4=B3=D2=BB=B8=F6=CA=F4=D0=D4=
=A3=BAattributeRemoved ('userid')</P>
<P =
class=3DMsoNormal>=B8=C3log=CE=C4=BC=FE=BC=C7=C2=BC=C1=CB=BC=E0=CC=FD=C6=F7=
=CB=F9=D7=F6=B5=C4=B6=AF=D7=F7=A1=A3</P>
<H3>12.2.2 Http=BB=E1=BB=B0=BC=E0=CC=FD=C6=F7=CA=B5=C0=FD</H3>
<P=20
class=3DMsoNormal>=CD=A8=B9=FD=C9=CF=D2=BB=B8=F6=BC=E0=CC=FD=C6=F7=CA=B5=C0=
=FD=A3=AC=B6=C1=D5=DF=D3=A6=B8=C3=B6=D4=BC=E0=CC=FD=C6=F7=B5=C4=CA=B5=CF=D6=
=B9=FD=B3=CC=D3=D0=CB=F9=C1=CB=BD=E2=A3=AC=B1=BE=D0=A1=BD=DA=BD=AB=D2=AA=BD=
=E9=C9=DC=BB=F9=D3=DAHttp=BB=E1=BB=B0=B5=C4=BC=E0=CC=FD=C6=F7=A1=A3=CA=D7=
=CF=C8=B4=B4=BD=A8=BC=E0=CC=FD=C6=F7=C0=E0MySessionListener.java=A3=AC=C6=
=E4=D4=B4=B4=FA=C2=EB=C8=E7=CF=C2=A3=BA</P>
<P class=3Da2 style=3D"LINE-HEIGHT: 11.7pt">package servlet;</P>
<P class=3Da2 style=3D"LINE-HEIGHT: 11.7pt">import =
java.io.FileOutputStream;</P>
<P class=3Da2 style=3D"LINE-HEIGHT: 11.7pt">import =
java.io.PrintWriter;</P>
<P class=3Da2 style=3D"LINE-HEIGHT: 11.7pt">import =
javax.servlet.ServletContext;</P>
<P class=3Da2 style=3D"LINE-HEIGHT: 11.7pt">import=20
javax.servlet.ServletContextEvent;</P>
<P class=3Da2 style=3D"LINE-HEIGHT: 11.7pt">import=20
javax.servlet.ServletContextListener;</P>
<P class=3Da2 style=3D"LINE-HEIGHT: 11.7pt">import=20
javax.servlet.http.HttpSessionActivationListener;</P>
<P class=3Da2 style=3D"LINE-HEIGHT: 11.7pt">import=20
javax.servlet.http.HttpSessionAttributeListener;</P>
<P class=3Da2 style=3D"LINE-HEIGHT: 11.7pt">import=20
javax.servlet.http.HttpSessionBindingEvent;</P>
<P class=3Da2 style=3D"LINE-HEIGHT: 11.7pt">import=20
javax.servlet.http.HttpSessionEvent;</P>
<P class=3Da2 style=3D"LINE-HEIGHT: 11.7pt">import=20
javax.servlet.http.HttpSessionListener;</P>
<P class=3Da2 style=3D"LINE-HEIGHT: 11.7pt">public class =
MySessionListener </P>
<P class=3Da2 style=3D"LINE-HEIGHT: =
11.7pt"> =20
implements =
HttpSessionActivationListener,HttpSessionAttributeListener,</P>
<P class=3Da2=20
style=3D"LINE-HEIGHT: =
11.7pt">  =
; =20
HttpSessionListener,ServletContextListener{</P>
<P class=3Da2 style=3D"LINE-HEIGHT: 11.7pt"> =
ServletContext=20
context =3D null;</P>
<P class=3Da2=20
style=3D"LINE-HEIGHT: =
11.7pt"> int=20
users =3D 0;</P>
<P class=3Da2=20
style=3D"LINE-HEIGHT: =
11.7pt"> =20
public void sessionWillPassivate(HttpSessionEvent arg0) {</P>
<P class=3Da2=20
style=3D"LINE-HEIGHT: =
11.7pt">  =
; =20
//=BC=E0=CC=FDHttp=BB=E1=BB=B0=B5=C4passivate=C7=E9=BF=F6</P>
<P class=3Da2=20
style=3D"LINE-HEIGHT: =
11.7pt">  =
; =20
print("sessionWillPassivate("+arg0.getSession().getId()+")");</P>
<P class=3Da2=20
style=3D"LINE-HEIGHT: =
11.7pt"> =20
}</P>
<P class=3Da2=20
style=3D"LINE-HEIGHT: =
11.7pt"> =20
public void sessionDidActivate(HttpSessionEvent arg0) {</P>
<P class=3Da2=20
style=3D"LINE-HEIGHT: =
11.7pt">  =
; =20
//=BC=E0=CC=FDHttp=BB=E1=BB=B0=B5=C4active=C7=E9=BF=F6</P>
<P class=3Da2=20
style=3D"LINE-HEIGHT: =
11.7pt">  =
; =20
print("sessionDidActivate("+arg0.getSession().getId()+")");</P>
<P class=3Da2=20
style=3D"LINE-HEIGHT: =
11.7pt"> =20
}</P>
<P class=3Da2=20
style=3D"LINE-HEIGHT: =
11.7pt"> =20
public void attributeAdded(HttpSessionBindingEvent arg0) {</P>
<P class=3Da2=20
style=3D"LINE-HEIGHT: =
11.7pt">  =
; =20
//=BC=E0=CC=FDHttp=BB=E1=BB=B0=D6=D0=B5=C4=CA=F4=D0=D4=CC=ED=BC=D3</P>
<P class=3Da2=20
style=3D"LINE-HEIGHT: =
11.7pt"> =20
print("attributeAdded('"+arg0.getSession().getId()+"','"+arg0.getName()+"=
','"+arg0.getValue()+"')");</P>
<P class=3Da2=20
style=3D"LINE-HEIGHT: =
11.7pt"> =20
}</P>
<P class=3Da2=20
style=3D"LINE-HEIGHT: =
11.7pt"> =20
public void attributeRemoved(HttpSessionBindingEvent arg0) {</P>
<P class=3Da2=20
style=3D"LINE-HEIGHT: =
11.7pt">  =
; =20
//=BC=E0=CC=FDHttp=BB=E1=BB=B0=D6=D0=B5=C4=CA=F4=D0=D4=C9=BE=B3=FD</P>
<P class=3Da2=20
style=3D"LINE-HEIGHT: =
11.7pt"> =20
print("attributeRemoved('"+arg0.getSession().getId()+"','"+arg0.getName()=
+"','"+arg0.getValue()+"')");</P>
<P class=3Da2=20
style=3D"LINE-HEIGHT: =
11.7pt"> =20
}</P>
<P class=3Da2=20
style=3D"LINE-HEIGHT: =
11.7pt"> =20
public void attributeReplaced(HttpSessionBindingEvent arg0) {</P>
<P class=3Da2=20
style=3D"LINE-HEIGHT: =
11.7pt">  =
; =20
//=BC=E0=CC=FDHttp=BB=E1=BB=B0=D6=D0=B5=C4=CA=F4=D0=D4=B8=FC=B8=C4=B2=D9=D7=
=F7</P>
<P class=3Da2=20
style=3D"LINE-HEIGHT: =
11.7pt"> =20
print("attributeReplaced('"+arg0.getSession().getId()+"','"+arg0.getName(=
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